Motor stator and winding method thereof

Abstract

The invention provides a motor stator and a winding method thereof. The motor stator comprises an iron core and a stator winding. Stator slots are formed in the iron core at equal intervals. Each phase of the stator winding contains a stator coil group based on winding in a wave winding mode or lap winding mode and a connecting coil group enabling two of more than two groups of stator coil groups to be connected in series; and two winding leading-out wire groups are formed naturally at the two ends of the stator coil groups after series connection. Each stator coil group, each connecting coil group, and each winding leading-out wire group contains four flat type copper wires respectively. In addition, the invention also provides a winding method of the motor stator. On the basis of the wave winding or lap winding way, the corresponding stator windings of all phases are wound and the stator coil groups of all phases of the stator winding are connected in series. Under the circumstances that the motor stator volume is not changed, the motor power is substantially improved; and the power is high and the size is small relatively.

Description

technical field [0001] The invention relates to an internal part of a motor and a manufacturing method thereof, in particular to a motor stator with relatively large power and relatively small volume and a winding method thereof. Background technique [0002] With the rapid development of automotive technology, especially electric vehicle technology, the power requirements for automotive motors are also increasing, and the increase in power will inevitably lead to an increase in the volume of the motor; There are many, and the installation location provided for the motor is becoming narrower and more crowded. In the limited space, the power of the existing motor can no longer meet the demand. Therefore, the contradiction between the volume and power of the motor has become a technology for high-power research and development of the motor. problem. [0003] The stator windings of existing motors generally use round copper wires to form coil groups for winding. Since the cros...

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Problems solved by technology

[0002] With the rapid development of automotive technology, especially electric vehicle technology, the power requirements for automotive motors are also increasing, and the increase in power will inevitably lead to an increase in the volume of the motor; There are many, and the installation location provided for the motor is becoming narrower and more crowded. In the limited space, the power of the existing motor can no longer meet the demand. Therefore, the contradiction between the volume and power of the motor has become a technology for high-power research and development of the motor. problem

[0003] The stator windings of existing electric motors generally use round copper wires to form coil groups for winding. Since the cross-sectional area of ​​round copper wires is relatively small, each coil group needs to contain more round copper wires, and the volume of the formed coil group Relatively large, the heat dissipation effect is poor, and there are many consumables, and the cost is high; in addition, in the existing stator windings, the coil groups of the same phase are generally wound separately and then connected in parallel, and then The phases are connected to each other in a star or delta connection, so that when the power of the motor increases, its volume will become larger and larger, and the number of round copper wires that need to be used is also large, and the cost is relatively high

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